Sports Wiki
Evergreen explainers on the rules, tactics, records and numbers behind football and basketball — built to be read long after the final whistle.
- Rankings4 Sept 2026
The usage and efficiency trade-off explained
Why doing more usually means doing it less efficiently, how the trade-off shapes a player's value, what separates a true star, and how to read scoring numbers fairly.
- Rankings4 Sept 2026
Strength of schedule and adjusted ratings explained
Why raw records can mislead, what strength of schedule measures, how adjusted ratings correct for opponent quality, and why they give a fairer comparison.
- Rankings4 Sept 2026
Set-piece xG and dead-ball value explained
What set-piece xG measures, why dead-ball situations are a distinct source of chances, how teams come to rely on them, and how to read the numbers.
- Rankings4 Sept 2026
Second-chance and fast-break points explained
What second-chance and fast-break points measure, where each type of scoring comes from, why the breakdown reveals a team's identity, and how to read it.
- Rankings4 Sept 2026
Post-shot xG and goalkeeper shot-stopping explained
What post-shot xG measures, how it differs from ordinary xG, how it is used to judge a goalkeeper's shot-stopping, and how to read it sensibly.
- Rankings4 Sept 2026
What is expected threat (xT)? Valuing every move
Expected threat in one sentence, how the pitch is turned into a value map, why it rewards ball progression, and how it differs from expected goals.
- Rankings4 Sept 2026
Expected goals per shot explained: measuring shot quality
What expected goals per shot means, how it separates good chances from many bad ones, why it reveals a team's shooting approach, and how to read it.
- Rankings4 Sept 2026
Clutch statistics explained
What clutch time means, how clutch statistics are defined, what they try to capture about late-game performance, and why they must be read with caution.
- Rankings4 Sept 2026
Three-point rate and shot selection explained
What three-point rate measures, why where a team shoots from matters as much as how well, how analytics reshaped shot selection, and how to read these numbers.
- Rankings4 Sept 2026
Steal rate and block rate explained
What steal rate and block rate measure, why rates beat raw totals, what they can and cannot tell you about defence, and how to read them sensibly.
- Rankings4 Sept 2026
Progressive passes and carries explained
What makes a pass or carry progressive, how these numbers measure ball progression, why they value build-up as well as the final ball, and how to read them.
- Rankings4 Sept 2026
What is non-penalty xG (npxG)? A cleaner look at attacking quality
Non-penalty expected goals in one sentence, why penalties are stripped out, what npxG reveals about a striker's open-play quality, and how to read it sensibly.
- Rankings4 Sept 2026
What is free throw rate? Getting to the line
Free throw rate in one sentence, how it is calculated, why getting to the line is so valuable, and how to read it for players and teams.
- Rankings4 Sept 2026
What is field tilt? Measuring territorial dominance
Field tilt in one sentence, how it measures where the game is played, why it differs from raw possession, and how to read a team's territorial control.
- Rankings4 Sept 2026
Big chances and chances created explained
What chances created and big chances mean, how they differ from assists, why big chances measure quality as well as quantity, and how to read them sensibly.
- Rankings4 Sept 2026
Assist percentage and turnover percentage explained
What assist percentage and turnover percentage measure, why rates beat raw totals, how the two together judge a playmaker, and how to read them sensibly.
- Rankings4 Sept 2026
Win Shares and VORP explained: catch-all value metrics
Win Shares and VORP in one sentence, how each turns a player's production into total value, why they differ from raw plus-minus, and the limits of any single all-in-one number.
- Rankings4 Sept 2026
The four factors of basketball explained
The four factors in one sentence, what each one measures, why they are ranked in order of importance, and how they explain why a team wins or loses.
- Rankings4 Sept 2026
What is PPDA? Measuring how hard a team presses
PPDA in one sentence, how the number is built from passes and defensive actions, why a low value means aggressive pressing, and how to read it in the context of the game.
- Rankings4 Sept 2026
What is PER? Player Efficiency Rating explained
Player Efficiency Rating in one sentence, how it squeezes a player's box score into one number, why the league average is always fifteen, and the limits you should keep in mind.